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Chint NB1-63D1P20 MCB – 1P – D Curve – 20A – 6kA
Chint NB1-63D1P20 1 pole miniature circuit breaker with 20 A rated current, D curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£3.20
Why Choose the Chint NB1-63D1P20 Miniature Circuit Breaker?
The Chint NB1-63D1P20 is a compact and dependable miniature circuit breaker (MCB) designed to protect low voltage electrical circuits against overloads and short circuits. As part of the Chint NB1-63 series, it provides reliable circuit protection for residential, commercial and light industrial installations.
This 1 pole D curve MCB features a 20 A rated current, making it suitable for circuits supplying transformers, solenoids, discharge lighting, motors and equipment with high inrush currents. The D curve tripping characteristic is specifically designed for highly inductive loads that can generate substantial start-up currents.
With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63D1P20 is easy to install within consumer units, distribution boards and electrical control panels. Its compact modular construction supports neat installation and dependable long-term performance.
Key Advantages
- Compact 1 pole miniature circuit breaker.
- 20 A rated current for high inrush current circuits.
- D curve trip characteristic for inductive and start-up loads.
- 6 kA short-circuit breaking capacity.
- Reliable overload and short-circuit protection.
- Quick DIN rail installation in distribution boards and control panels.
Key Features
- Chint NB1-63 series MCB.
- 20 A rated current.
- D curve tripping characteristic.
- 1 pole configuration.
- 6 kA breaking capacity.
- 230 V AC rated voltage.
- DIN rail mounting.
- Suitable for overload and short-circuit protection.
Reliable Protection for High Inrush Current Circuits
Miniature circuit breakers such as the Chint NB1-63D1P20 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect cables, connected equipment and electrical installations from damage caused by excessive current.
The D curve characteristic trips between approximately 10 and 14 times the rated current, making this breaker suitable for transformers, magnetic devices, discharge lighting, motors and other equipment with high starting currents. Its DIN rail format allows simple integration into new or existing electrical panels.
Typical Applications
- Industrial control panels.
- Transformer protection.
- Magnetic contactor circuits.
- Discharge lighting circuits.
- Motors and high inrush loads.
- General electrical installations requiring 20 A protection.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63D1P20 | |
| Product type | Miniature circuit breaker / MCB | |
| Rated current | 20 A | |
| Number of poles | 1 pole | |
| Tripping characteristic | D curve | |
| Rated voltage | 230 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 6 kA | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Standards | IEC / EN 60898-1 |
Frequently Asked Questions
What is the Chint NB1-63D1P20 used for?
The Chint NB1-63D1P20 protects electrical circuits against overloads and short circuits, particularly where high inrush currents are present.
What current rating does this MCB have?
This miniature circuit breaker has a rated current of 20 A.
What does the D curve characteristic mean?
A D curve MCB is designed for circuits with high inrush currents, such as transformers, motors, discharge lighting, solenoids and similar inductive loads.
What is the breaking capacity?
The NB1-63D1P20 has a rated short-circuit breaking capacity of 6 kA.
How is this MCB installed?
The breaker is designed for installation onto a standard 35 mm DIN rail inside consumer units, distribution boards and electrical control panels.
Trusted by Electrical Professionals Worldwide
Chint miniature circuit breakers are trusted by electricians, panel builders and maintenance engineers for dependable circuit protection across residential, commercial and industrial electrical installations.
